Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment最新文献

{"title":"Radiation portal monitor data file format for comprehensive background radiation monitoring","authors":"JungHyun Bae ,&nbsp;Alexander Enders ,&nbsp;Charles Massey ,&nbsp;Jake Livesay ,&nbsp;Christopher Blessinger","doi":"10.1016/j.nima.2025.170516","DOIUrl":"10.1016/j.nima.2025.170516","url":null,"abstract":"<div><div>Radiation portal monitors (RPMs) are widely used at border security checkpoints to detect the presence of radioactive materials in people, vehicles, and cargo. Typically, RPM detection systems consist of two pillars equipped with gamma and neutron detectors. To improve detection efficiency, RPMs employ techniques such as a limited energy window, dynamic alarm thresholds, and lead shielding. However, without continuous monitoring of background radiation, signal interpretation can be compromised, because environmental factors and mechanical failures can cause fluctuations. Here, we introduce a daily file format that logs gamma background and neutron background radiation levels continuously over a 24 h period; this format is different from traditional formats that record data only when the RPM is active or occupied. The approach enables RPM operators and analysts to (1) identify and diagnose malfunctioning components, (2) adjust system settings to account for dynamic environmental factors, and (3) use the recorded data to characterize outer space phenomena. Continuous background reporting is essential for identifying issues such as faulty connections, voltage divider failures, and errors in background updates. Continuous background reporting also enables the detection of external influences, including nearby X-ray scanners, temperature fluctuations, rainfall, cosmic radiation, and lunar phase changes. These data files are designed to be easily evaluated and parsed using common tools, and a quick review by an expert is often sufficient for problem diagnosis. We anticipate that continuous background radiation monitoring and these new strategies will significantly improve the accuracy and reliability of RPM systems, reducing the rate of false alarms and enhancing overall system performance.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1076 ","pages":"Article 170516"},"PeriodicalIF":1.5,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of cosmogenic Ge-68 background in a high purity germanium detector via a time series fitting method","authors":"W.H. Dai ,&nbsp;J.K. Chen ,&nbsp;H. Ma ,&nbsp;Z. Zeng ,&nbsp;M.K. Jin ,&nbsp;Q.L. Zhang ,&nbsp;J.P. Cheng","doi":"10.1016/j.nima.2025.170472","DOIUrl":"10.1016/j.nima.2025.170472","url":null,"abstract":"<div><div>Ge-68 is a cosmogenic isotope in germanium with a half-life of 270.9 days. Ge-68 and its decay daughter Ga-68 contribute considerable background with energy up to 3 MeV to low background <span><math><mi>γ</mi></math></span> spectrometers using high purity germanium (HPGe) detectors. In this paper, we evaluated the background of Ge-68 and Ga-68 in a <span><math><mi>p</mi></math></span>-type coaxial HPGe detector operated at China Jinping underground laboratory (CJPL) via a time series fitting method. Under the assumption that Ge-68 and Ga-68 are in radioactive equilibrium and airborne radon daughters are uniformly distributed in the measurement chamber of the spectrometer, we fit the time series of count rate in 1-3 MeV to calculate the Ge-68 activity, radon daughter concentrations, and the time-invariant background component. A total of 90-day measurement data were used in the analysis, a hypothesis test confirmed a significant Ge-68 signal at 99.64% confidence level. The initial activity of Ge-68 is fitted to be 477.0<span><math><mrow><mo>±</mo><mn>112</mn><mo>.</mo><mn>4</mn><mi>μ</mi></mrow></math></span>Bq/kg, corresponding to an integral count rate of 55.9 count/day in the 1-3 MeV range. During the measurement, Ge-68 activity decreased by about 30%, contributing about 62% of the total background in the 1-3 MeV range. Our method also provides an estimation of the variation of airborne radon daughter concentrations in the measurement chamber, which could be used to monitor the performance of radon reduction measures.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1076 ","pages":"Article 170472"},"PeriodicalIF":1.5,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A computer-vision aided Compton-imaging system for radioactive waste characterization and decommissioning of nuclear power plants","authors":"Víctor Babiano-Suárez ,&nbsp;Javier Balibrea-Correa ,&nbsp;Ion Ladarescu ,&nbsp;Jorge Lerendegui-Marco ,&nbsp;César Domingo-Pardo","doi":"10.1016/j.nima.2025.170449","DOIUrl":"10.1016/j.nima.2025.170449","url":null,"abstract":"<div><div>Nuclear energy production is inherently tied to the management and disposal of radioactive waste. Enhancing classification and monitoring tools is therefore crucial, with significant socioeconomic implications. This paper reports on the applicability and performance of a high-efficiency, cost-effective and portable Compton camera for detecting and visualizing low- and medium-level radioactive waste from the decommissioning and regular operation of nuclear power plants. The results demonstrate the good performance of Compton imaging for this type of application, both in terms of image resolution and reduced measuring time. A technical readiness level of TRL7 has been thus achieved with this system prototype, as demonstrated with dedicated field measurements carried out at the radioactive-waste disposal plant of El Cabril (Spain) utilizing a pluarility of radioactive-waste drums from decomissioned nuclear power plants. The performance of the system has been enhanced by means of computer-vision techniques in combination with advanced Compton-image reconstruction algorithms based on Maximum-Likelihood Expectation Maximization. Finally, we also show the feasibility of 3D tomographic reconstruction from a series of relatively short measurements around the objects of interest. The potential of this imaging system to enhance nuclear waste management makes it a promising innovation for the nuclear industry.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1076 ","pages":"Article 170449"},"PeriodicalIF":1.5,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An integrated wakefield-powered high-gradient X-band photoinjector for compact light source applications","authors":"Emily Frame ,&nbsp;Gongxiaohui Chen ,&nbsp;Philippe Piot ,&nbsp;Scott Doran ,&nbsp;Eric Wisniewski ,&nbsp;Chunguang Jing ,&nbsp;John Power ,&nbsp;Sergey Kuzikov","doi":"10.1016/j.nima.2025.170463","DOIUrl":"10.1016/j.nima.2025.170463","url":null,"abstract":"<div><div>Two-beam acceleration is a powerful method to generate high accelerating fields by utilizing short radiofrequency pulses. The Argonne Wakefield Accelerator facility is applying a two-beam acceleration approach to an X-band radiofrequency gun. This gun has experimentally demonstrated an electric field on the photocathode of <span><math><mrow><mo>∼</mo><mn>400</mn></mrow></math></span> MV/m. The next phase of this experiment will involve adding a short X-band linac to boost the beam energy up to 10 MeV. This paper summarizes the optimization of the linac and beam dynamics simulations in the integrated system over a wide range of operating parameters and demonstrates that the available setup will support the generation of bright or ultrashort beams with possible applications to compact light sources including inverse Compton scattering.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1076 ","pages":"Article 170463"},"PeriodicalIF":1.5,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Filter stack spectrometer measurements of high energy x-ray sources for radiography","authors":"Joseph Strehlow ,&nbsp;Chun-Shang Wong ,&nbsp;Scott V. Luedtke ,&nbsp;Alemayehu Bogale ,&nbsp;Alejandro Figueroa Bengoa ,&nbsp;Rebecca Fitzgarrald ,&nbsp;L. Tyler Mix ,&nbsp;Ryan Nedbailo ,&nbsp;Dean R. Rusby ,&nbsp;John L. Schmidt ,&nbsp;Justin Twardowski ,&nbsp;Ashlyn Van Pelt ,&nbsp;Josh E. Coleman ,&nbsp;D. Cort Gautier ,&nbsp;James Hunter ,&nbsp;Sasi Palaniyappan ,&nbsp;Christopher Tomkins ,&nbsp;Brian J. Albright","doi":"10.1016/j.nima.2025.170465","DOIUrl":"10.1016/j.nima.2025.170465","url":null,"abstract":"<div><div>Analyzing the spectra of MeV x-rays verifies the consistency of radiographic systems and provides a standardized way to compare outputs from different sources, such as traditional accelerator-based systems and newer laser-based systems. A stack of alternating image plates and filters, known as a Filter Stack Spectrometer (FSS), has been fielded at three x-ray sources: the Dual Axis Radiographic Hydrodynamic Test (DARHT) facility, the X5000 commercial x-ray cabinet, and the Texas Petawatt laser. On the radiographic sources tested, varying salient parameters such as electron energy and target material changes the output MeV x-ray spectra. This diagnostic, configured with a spectral range of 50 keV–35 MeV, is evaluated via a novel inversion routine insensitive to assumed spectral shape. This insensitivity to spectral shape is essential for measuring spectra of sources that are difficult to predict with radiation transport models, such as multi-pulse accelerators and laser-driven sources. Radiation transport calculations representative of the DARHT experiment, which is straightforward to model, show good agreement between simulated and measured spectra. Future improvements to the FSS, such as replacing time-integrated image plates with scintillators, are also discussed.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1076 ","pages":"Article 170465"},"PeriodicalIF":1.5,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance and longevity of CO2 based mixtures in CMS improved Resistive Plate Chambers in the HL-LHC environment","authors":"J.P. Pinheiro ,&nbsp;M. Tytgat ,&nbsp;K. Mota Amarilo ,&nbsp;A. Samalan ,&nbsp;K. Skovpen ,&nbsp;G.A. Alves ,&nbsp;E. Alves Coelho ,&nbsp;F. Marujo da Silva ,&nbsp;M. Barroso Ferreira Filho ,&nbsp;E.M. Da Costa ,&nbsp;D. De Jesus Damiao ,&nbsp;B.C. Ferreira ,&nbsp;S. Fonseca De Souza ,&nbsp;L. Mundim ,&nbsp;H. Nogima ,&nbsp;A. Santoro ,&nbsp;M. Thiel ,&nbsp;R. Gomes De Souza ,&nbsp;T. De Andrade rangel Monteiro ,&nbsp;A. Aleksandrov ,&nbsp;J. Eysermans","doi":"10.1016/j.nima.2025.170451","DOIUrl":"10.1016/j.nima.2025.170451","url":null,"abstract":"<div><div>Resistive Plate Chamber (RPC) detectors are widely used in high-energy physics experiments. In the Compact Muon Solenoid (CMS), the RPC gas mixture is composed of 95.2% C<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>H<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>F<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span>, which generates a large number of ion-electron pairs, 4.5% iC<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span>H₁₀ to suppress photon feedback effects, and 0.3% SF<span><math><msub><mrow></mrow><mrow><mn>6</mn></mrow></msub></math></span> as an electron quencher to ensure operation in streamer-free mode. Given the high global warming potential (GWP) of C<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>H<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>F<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span> at 1430 and the recent reduction in the emission of F gases imposed by the European Union, efforts have intensified in recent years to explore environmentally friendly gas alternatives. A promising short- to mid-term solution for the upcoming years of Large Hadron Collider (LHC) operations is to lower the GWP of the RPC gas mixture by partially substituting C<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>H<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>F<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span> with CO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>. The performance tests of the alternative gas mixtures are conducted at the CERN Gamma Irradiation Facility (GIF++) in the North Area of the Super Proton Synchrotron (SPS), where a 13.6 TBq radiation source and an SPS muon beam simulate the High-Luminosity (HL) Phase II conditions of the LHC. This paper reports on the performance of a 1.4 mm gap RPC using three different CO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>-based mixtures under intense gamma radiation, with the first results on the longevity campaign.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1076 ","pages":"Article 170451"},"PeriodicalIF":1.5,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143806863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analytic derivation of the multiplicity moments in Active Neutron Coincidence Counting with a non-Poissonian interrogation source","authors":"E.O. Cohen ,&nbsp;C. Dubi ,&nbsp;R. Yankovich","doi":"10.1016/j.nima.2025.170469","DOIUrl":"10.1016/j.nima.2025.170469","url":null,"abstract":"<div><div>Active Neutron Multiplicity Counting (ANMC) methods utilize an inversion formula to extract the intensity of a fission source. This is achieved by analyzing the sampled moments of the count distribution, which are generated through the process of inducing fissions in the sample using an external interrogation source. ANMC serves as a powerful tool for quantifying fissile mass e.g., for uranium quantification in mines, fuel fabrication facilities, and reprocessing plants. Typical ANMC methods employ Poissonian interrogation neutron sources, such as AmLi, which emit a single neutron at each source event.</div><div>In this study, we expand upon the conventional formulas used in ANMC inversion to accommodate non-Poissonian interrogation sources. Specifically, we derive analytical expressions for the rates of Singles and Doubles events in ANMC systems. This advancement holds practical significance as it enables the future implementation of ANMC methods utilizing external sources with correlated neutrons, such as AmBe or ²⁵²Cf.</div><div>Aligned with established formulas, the derived formulas in this study adhere to the single-group model and incorporate the influence of fission chains through the widely recognized Bohnel method.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1076 ","pages":"Article 170469"},"PeriodicalIF":1.5,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on real-time identification algorithm of nuclear radiation events in Camera videos under low dose rates","authors":"Jie Gu ,&nbsp;Tiantian Dai ,&nbsp;Manting Wang ,&nbsp;Zhaohui Zhang ,&nbsp;Shoulong Xu ,&nbsp;Qingyang Wei","doi":"10.1016/j.nima.2025.170485","DOIUrl":"10.1016/j.nima.2025.170485","url":null,"abstract":"<div><div>With the advancement of social production, nuclear science and technology have been widely applied across various fields, including industry, agriculture, medical care, materials science, and archaeology. However, the application of nuclear technology also involves certain risks. When nuclear radiation exceeds a specific dose threshold, it can be harmful to human health, posing threats to public safety and even national security. Ensuring nuclear safety is closely linked to the detection and monitoring of nuclear radiation. Complementary Metal Oxide Semiconductor (CMOS) sensors are widely available and cost-effective. In environments with low dose rates, CMOS-based nuclear radiation detection represents an innovative approach to enhancing nuclear safety. High-energy rays produced by nuclear radiation interact directly with CMOS, depositing energy that converts into a substantial amount of charge, which manifests as bright spots that exceed the background in images. This paper proposes a real-time detection algorithm for identifying radiation bright spots under low dose rates, utilizing the Yolov5 convolutional neural network model. Initially, we perform a preliminary extraction of nuclear radiation bright spots using the frame difference method and the counter (CNT) algorithm for background subtraction, among other techniques. Subsequently, the enhanced Yolov5 model is employed to refine the preliminary detection results further. Finally, experiments are designed based on the characteristics of nuclear radiation events to validate the accuracy of the proposed algorithm in practical applications, enabling efficient real-time identification of nuclear radiation events.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1076 ","pages":"Article 170485"},"PeriodicalIF":1.5,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance envelope of laser wakefield accelerators","authors":"Lance Labun ,&nbsp;Miguel Gracia-Linares ,&nbsp;Ou Z. Labun ,&nbsp;Stephen V. Milton","doi":"10.1016/j.nima.2025.170468","DOIUrl":"10.1016/j.nima.2025.170468","url":null,"abstract":"<div><div>Laser wakefield accelerator experiments have made enormous progress over the past <span><math><mrow><mo>∼</mo><mn>20</mn></mrow></math></span> years, but their promise to revolutionize high-energy particle sources is only beginning to be realized. To make the next step toward engineering LWFAs for different accelerator outcomes, we need more reliable and quantitative models to predict performance. Using the data from <span><math><mrow><mo>&gt;</mo><mn>50</mn></mrow></math></span> published experiments, we estimate scalings and the performance envelope. We compare the observed scalings with several models in the literature. We find that the total beam energy (centroid energy times beam charge) scales almost linearly with laser energy, supporting the value of investment in progressively higher energy driver lasers. The dataset includes pulse durations from 8 to 160 fs, but only laser wavelengths of 800 nm and 1 µm, meaning we could not check proposed wavelength scalings for alternative laser technologies. As a benchmark next-generation case, the observed scalings suggest that achieving a 100-GeV LWFA stage will require a <span><math><mrow><mo>≳</mo><mn>30</mn></mrow></math></span> PW laser operating at electron density <span><math><mrow><mo>&lt;</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>17</mn></mrow></msup><mo>/</mo></mrow></math></span>cm<span><math><msup><mrow></mrow><mrow><mn>3</mn></mrow></msup></math></span>.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1076 ","pages":"Article 170468"},"PeriodicalIF":1.5,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143777567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simulation and optimization of fission fragment and α particle discrimination in coaxial fission chambers operating in pulse mode","authors":"Jiecheng Yang,&nbsp;Jianguo Qin,&nbsp;Jie Yan","doi":"10.1016/j.nima.2025.170441","DOIUrl":"10.1016/j.nima.2025.170441","url":null,"abstract":"<div><div>In various operational scenarios, the neutron detection process using fission chambers can be subject to interference from <span><math><mi>α</mi></math></span> particles and other factors. A crucial aspect of current research on fission chambers is the design and simulation customized for specific applications, aiming to improve the efficiency of their development. This study addresses these issues by employing programs such as Garfield<span><math><mrow><mo>+</mo><mo>+</mo></mrow></math></span>, GEF, and SRIM to develop a numerical toolkit for simulating fission chambers, which features a framework similar to CHESTER. The developed program is further utilized to carry out the analysis of pulse-mode coaxial fission chambers. The effects of key parameters, such as coating thickness, electrode spacing, gas pressure and composition, on the separation between <span><math><mi>α</mi></math></span> particles and fission fragments in pulse height spectra are investigated.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1076 ","pages":"Article 170441"},"PeriodicalIF":1.5,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}